Practice - Worked Example: Concentration from Calibration Curve
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Practice Questions
Test your understanding with targeted questions
What is the absorption equation used to determine concentration?
💡 Hint: Identify the variables involved.
If the slope (m) is 2.0 and intercept (b) is 0, what is the concentration for an absorbance of 0.6?
💡 Hint: Rearrange the absorption equation.
4 more questions available
Interactive Quizzes
Quick quizzes to reinforce your learning
What does A stand for in the equation A = mC + b?
💡 Hint: Think about the basic measurements in spectrometry.
True or False: The slope of the calibration curve decreases as concentration increases.
💡 Hint: Consider how absorbance relates to concentration.
1 more question available
Challenge Problems
Push your limits with advanced challenges
A sample measured absorbance of 0.750 with a slope of 1.500 ± 0.020 and an intercept of 0.050 ± 0.005. Determine the concentration and its associated uncertainty, providing all calculations done.
💡 Hint: Use derivative methods for propagating uncertainties.
If you had a linear calibration curve but when plotting values you found deviations at high concentrations, what methods could you use to correct this and ensure reliability?
💡 Hint: Think about how to adjust your measurements to fit within regard of Beer’s law.
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